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Service Manual – Driving Axle
1.5 Table of Tightening Torque for Common Bolts
Bolt
Strength
grades
4.6
5.6
6.8
8.8
10.9
12.9
Screw
Strength
grades
4.6
5.6
6.8
8.8
10.9
12.9
Screw
Strength
grades
4.6
5.6
Yield
Strength
(N/mm2)
240
300
480
640
900
1080
Yield
Strength
(N/mm2)
240
300
480
640
900
1080
Yield
Strength
(N/mm2)
240
300
6.8
6
4~5
5~7
7~9
9~12
13~16
16~21
16
90~110
110~140
145~193
193~257
280~330
326~434
27
Nominal Diameter of Bolts(mm)
8
10
12
Tightening Torque(N·m)
10~12
12~15
17~23
22~30
30~36
38~51
20~25
25~32
33~45
45~59
65~78
75~100
36~45
45~55
58~78
78~104
110~130
131~175
Nominal Diameter of Bolts (mm)
18
20
22
Tightening Torque (N·m)
120~150
150~190
199~264
264~354
380~450
448~597
170~210
210~270
282~376
376~502
540~650
635~847
230~290
290~350
384~512
521~683
740~880
864~1152
Nominal Diameter of Bolts (mm)
30
33
36
Tightening Torque (N·m)
450~530
550~700
540~680
680~850
480
714~952
969~1293
8.8
640
10.9
900
12.9
1080
952~
1269
1400~
1650
1606~
2142
1293~
1723
1700~
2000
2181~
2908
670~880
825~1100
1319~
1759
1759~
2345
2473~
3298
2968~
3958
14
55~70
70~90
93~124
124~165
180~210
209~278
24
300~377
370~450
488~650
651~868
940~1120
1098~1464
39
900~1100
1120~1400
928~1237
1160~1546
1694~2259
1559~2079
2259~3012
2923~3898
2800~3350
4111~5481
3812~5082
4933~6577
Remark: The tightening torque of joint bolts can be executed referred this previous table during
the assembling operation. When the tightening torque given in the chapter IV is not accord with the
table, it should be executed according with the tightening torque given in the chapter IV.
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